CVE-2026-46628

Twig: The `spaceless` filter implicitly marks its output as safe

State: Published
Severity: 5.1 Medium
Published: Jul 14, 2026
Updated: Jul 15, 2026
Reserved: May 15, 2026

Description

Twig is a template language for PHP. Prior to 3.26.0, the deprecated spaceless filter is registered as safe for HTML, causing Twig autoescaping to emit attacker-controlled markup unescaped when spaceless is applied to untrusted input. This issue is fixed in version 3.26.0.

Scores

CVSS	Score	Vector	Source
4.0	5.1 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N	GitHub_M

Weaknesses

CWE-116 Improper Encoding or Escaping of Output

Affected Products

Product	Versions
Twigtwigphp	< 3.26.0Affected

References

https://github.com/twigphp/Twig/security/advisories/GHSA-4j38-f5cw-54h7
https://github.com/twigphp/Twig/commit/3190b9ae12614dfd58cc5d8f394bac4708b17913
https://github.com/twigphp/Twig/releases/tag/v3.26.0

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